The tree still celebrates its essential treeness through song, as nature will do whatever we impose on her. Birds still sing their ancient songs in the middle of a bustling city, with all its cacophony of man-made sounds. Dry leaves still rustle like dice even when growing against concrete or hewn stone. Out of a tiny crack in a pavement will crawl a perfectly formed insect, a creature of curves and protrusions amidst a linear world of man's engineering.